The **`Buffer.isEncoding()` function** tests if an encoding format is supported or not.

# Parameter and return value
The `Buffer.isEncoding()` function accepts the encoding format as a single parameter of type `string`.

The `Buffer.isEncoding()` function returns `true` if the encoding format is supported; otherwise, it returns `false`.

# Examples
The following code demonstrates how to use the `Buffer.isEncoding()` function in Node.js.

console.log(Buffer.isEncoding('base64'));

console.log(Buffer.isEncoding('hex'));

console.log(Buffer.isEncoding('utf8'));

console.log(Buffer.isEncoding('ucs2'));

console.log(Buffer.isEncoding('binary'));

console.log(Buffer.isEncoding('utf/8'));

console.log(Buffer.isEncoding('randomencoding'));


The above example illustrates that some of the supported encoding formats are `base64`, `hex`, `utf8`, `ucs2`, and `binary`.

What is Buffer.isEncoding() in Node.js?

Prototype

Parameter and return value

Examples